This secondary diaphragm spring kit lets tuners change the opening rate of a Holley carburetor's secondary side, adjusting how aggressively the secondaries come in.
Specifications:
- Assortment Quantity: 7
- Spring Force: Assorted
- Wire Diameter: Assorted
- Length: Assorted
- Material: Steel
- Category: Air and Fuel Delivery
- Part Number: 20-13
FAQ
What does the 20-13 spring kit do?
It allows changing the rate of the secondary operating ranges on a Holley carburetor.
How many springs are included?
Seven, in an assortment of spring forces and wire diameters.
What material are the springs made from?
Steel.

